In part 1 when the third coffin containing minato came up it looked like hiruzen did some kind of Jutsu to make it not work but what happened was minatos soul was sealed
People call that the neutralizer Jutsu
its a fanmade jutsu hiruzen fapboys created by purposefully misinterpreting, speculating and straight out fanboying his character
The Hiruzen fapboys need some kind of offering to bring their fave to the table. Even if it means lying and making up a jutsu just to put him up there with the actual decent characters.
It was an attack made from all the sages combined that was said to be able to wipe out Kaguya herself!
This guy has it half right.
It's an original attack made by Hiruzen himself, and it is more OP than even KA.
Using the Neutraliser Jutsu, Hiruzen can one-shot Kaguya.
However, it requires high chakra reserves, and is thus only useable by Prime Hiruzen.
He also has Synthesizer which allows prime hiruzen to create any jutsu and use it. That's where he got the title Professor!!